ChipMOS Technologies is trading 5.6% up at $71.85 in pre-market activity, surging as part of a broader "AI Chip Stocks Stage Fierce Comeback" on July 9, 2026. - The company, a key player in the AI chip backend supply chain, rallied significantly, mirroring other semiconductor firms amidst renewed investor interest in AI-related demand. - This sector-wide surge was reportedly fueled by a rebound in Nvidia shares and market rumors regarding potential limited approval for H200 chips in China.